Steam-motor.



No. 666,959. Patented Jan. 29, I901.

W. F. &. J. 0. FINK.

STEAM MOTOR.

(Application filed Sept. 29, 1909.)

' 2 Sheets-Sheet I.

(No Model.)

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No. 666,959. Patented Ian. 29, 1901. L w. F. &. J. 0. FINK.

STEAM moron.

(Application filed Sept. 29, 1900.) (No Model.) 2 Sheets8haat 2.

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[[IHIHIHIW f 5 JNVENTORS, WM r M O W NtTED STATES ATENT FFICE.

WILLIAM F. FINK, OF BIRMINGHAM, ALABAMA, AND JAMES O. FINK, OF

- FAIRMOUNT, INDIANA.

STEAM -M OTOR.

SPECIFICATION forming part of Letters Patent No. 666,959, dated January 29, 1901.

Application filed September 29, 1900. Serial No. 81,505. (No model.)

To all whom it may concern.-

Be it known that we, WILLIAM F. FINK, of Birmingham, county of Jefferson, and State of Alabama, and JAMES O. FINK, of Fairmount, Grant county, Indiana, have invented a certain new and useful Steam-Motor; and we do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawin gs, in which like 11 u merals refer to like parts.

The object of this invention is to improve the operation of steam-motors of the kind adapted especially for use in driving pumps.

One feature of the invention is to so mount the valve which causes the reverse movement of the piston of the main valve that it will not only be reciprocated when actuated, but also somewhat rotated, whereby the wear on the valve-and the seat will be distributed, thereby always maintaining a perfect seat. A new feature in connection with the mounting of these valves is placing them where they are externally accessible for any purpose. Each of them is in this invention accessible independent of each other and independent of any other part of the machine. These, with the other features of our invention, will be understood from the accompanying drawings and the description following of one form of device embodying said invention, and the scope of said invention will be understood from the claims following said description.

Figure 1 is a central vertical longitudinal section of the apparatus broken away from a pump. Fig. 2 is a plan of the machine with the valvechest removed. Fig. 3 is a section on the line C O of Fig. 5. Fig. 4 isa portion of the same with the valve-bushing omitted. Fig. 5 is a plan of the machine with the valvechest removed. Fig. 6 is an end elevation of what is shown in Fig. 5 with parts broken away. Fig. 7 is a section on the line D D of Fig. 5, showing a vertical section of the upper part of the cylinder and valve chest thereon.

Referring now to the details of construction of the machine herein shown for the purpose of illustrating the general nature of our invention, 1 is a base having secured to it a vertical disk or cylinder-head 2. To the cylthe slide-valve.

inder-head 2 we secure a main steam-cylinder 6 by means of the bolts 7. 10 is the outside head of the cylinder. At the ends of said cylinder there are petcocks 12. The pistonrod 13 reciprocates in the packing-box l5 and has the piston-head 16. The valve-chest 75 is secured to the main cylinder by means of the bolts 23.

24 is a steam-inlet.

25 is the exhaust opposite the inlet 24.

26 is a passage from the steam-inlet opening into the valve chest 75. Within said valve-chest a main double-D valve 27 slides. It is provided with one or more narrow extensions 28 into the slot 29 of the auxiliary or valve-actuating piston 30, mounted in the upper port-ion of the valve-chest. Said auxiliary-piston valve reciprocates in a cylinder Whose heads 31 are screwed into place. Above the auxiliary-piston cylinder in the upper part of the valve'chest a shaft 32 is mounted, carrying a downwardly-extending arm 33, that extends between the extensions 28 from Said shaft is operated by the hand-wheel 34. The shaft is mounted in a slide-valve if it should stick or refuse to move. The incomingsteain through the passage 26 passes over the slide-valve and under one end thereof through the depression 36 and through one of the ports 37 that lead to the main cylinder near the end thereof. The steam, rushing in such manner to the end of the cylinder, drives the main'pistonhead and forces the steam through the other port 37 under the slide-valve through the passage-way or exhaust-port 39 to the outlet 25. To provide a steam-cushion at the end of the main cylinder to protect the head of the cylinder from the piston-head, a reduced port or passage-way 40 leads from each of the ports 37 to the end of the cylinder.

Turning now to the auxiliary valve for reversing the piston at each end of the main cylinder, a valve-chamber ll is provided, that is inclined up ward from the cylinder and away from a plane at a right angle to the axis of the cylinder and away from the vertical plane through the axis of the cylinder. A bushing 42 is secured in this chamber flush with the outside and provided with an offset to form packing-box, and its function is to throw the i the valve-seat 43, so that the internal bore of the bushing at the inner end is contracted as compared with the outer end. A port 44 leads from the contracted portion of the bushing or valve-chamber t0 the exhaust-port 25. A port 45 leads from the lower part of the large portion of the bushing or valve-chamber to the corresponding, end of the cylinder in the valve-chest in which the piston-valve 3O operates. A port 46 leads from the upper part of the enlarged portion of the bushing or valve-chamber into the valve-chest 75. In said bushing or auxiliary-valve chamber the valve 47 tits and operates. It consists of a small head 48 at one end and a large head 49 at the other end, with the body of the valve between said heads turned down and of smaller diameter than the smaller head and has a rectangular finger-piece 50 on the outer end for manipulating the valve. The smaller head 48 fits in the contracted portion of the valve-chamber, and the larger head 49 fits in the large portion of the valve-chamber or bushing, and at the large head 49 there is a shoulder 51, that engages and fits on the seat 43 of the bushing or valve-casing. The shoulder is of larger diameter than the smaller head 48 and of slightly smaller diameter than the large head 49. The end of the bushing is threaded to receive the cap 52.

From the foregoing description it is apparent that this valve is readily accessible, as by unscrewing the cap 52 the valve can be lifted out of its seat. The inner end of the valve is rather flat, and by the peculiar angle of the valve with relation to the pistonhead the latter at the limit of its stroke engages the edge of the inner end of the valve 47 and not only pushes it up out of the way, but slightly turns it. This latter result is caused by the fact that the valve does not extend toward the axis of the cylinder, but the axis of the valve, if extended, would be to one side of the axis of the cylinder. The object of slightly turning the valve, as well as slightly pushing it up, is to cause it to rotate on its seat to distribute the wear, thus always providing a tight joint. It also enables the valve to be raised more easily, as it gives to the valve a twisting motion instead of a direct end thrust. It also distributes the wear upon the inner end of the valve.

The auxiliary valve is kept down on its seat by the pressure of steam from the valvechest through the port 46 when it is in such position and shuts off any connection between the port 44 to the exhaust and the port 45 to the auxiliary-piston valve. The main piston when near its limit of movement pushes the valve 47 up against the pressure above, removing the shoulder 51 from the seat 43, so that the port 44 to the exhaust is connected with the port 45 from the auxiliary-piston valve. The escape of steam through to the exhaust-port relieves the pressure on one end of the auxiliary-piston valve, so that the pressure of the incoming steam against the other end will move it, and thereby move the main slide-valve and direct the steam into the other end of the main steam-cylinder 6. The auxiliary-piston valve 30 is actuated by steam passing from the valve-chest through the slot 29 and through a port 53. The port 53 is smaller than the port 45.

\Vhile we show herein bushings 42 for seating the auxiliary valves 47, the bushings are needless, as the valve-chambers 41 may be internally formed like the bushings and the latter omitted without any change in construction or operation of the valve, as appears in Fig. 6.

That we claim as our invention, and dcsire to secure by Letters Patent, is

1. In a steam-motor, the combination of the main valve and its piston, with the auxiliary valves extending into the main cylinder near its end with the axial line of said auxiliary valves being to one side of the axial line of the main piston, whereby said main piston will engage the edge of the inner end of the auxiliary valves and partially rotate them.

2. A steam-motor including a steam-cylinder, a valve-chamber extending through the wall of the cylinder near each end, a valve in each of said valve-chambers, and an external removable cap for closing each valvechamber, whereby said valves are externally and independently accessible.

In witness whereof we have hereunto affixed our signatures in the presence of the witnesses herein named.

WILLIAM F. FINK. JAMES O. FINK. Witnesses as to William F. Fink:

J. H. HEINEKE, OTTO DREHER. WVitnesses as to James O. Fink:

JAMEs N. ORABB, M. C. BUCK. 

